What next after failed septal ventricular tachycardia ablation?

Area of Science:

• Cardiology
• Electrophysiology
• Medical Devices

Background:

• Ventricular tachycardia (VT) ablation is challenging in cases with thick ventricular walls, such as the septum.
• Conventional radiofrequency (RF) ablation may be ineffective for septal VT foci due to wall thickness.

Purpose of the Study:

• To present a case of successful ethanol ablation for drug-resistant ventricular tachycardia originating from the septal outflow tract.
• To discuss alternative strategies for managing failed conventional radiofrequency ablation in septal VT.

Main Methods:

• The study presents a case of incessant, non-sustained slow VT originating from the septal outflow tract.
• Multiple conventional radiofrequency ablation attempts from various locations (both ventricles, anterior cardiac vein) were unsuccessful.
• High power and bipolar radiofrequency ablation also failed to terminate the arrhythmia.

Main Results:

• Ethanol ablation targeting the first septal perforator successfully terminated the ventricular tachycardia.
• This approach provided a definitive treatment when conventional methods failed.

Conclusions:

• Ethanol ablation can be a viable alternative for treating ventricular tachycardia originating from thick septal walls when radiofrequency ablation is unsuccessful.
• This case highlights the importance of considering alternative ablation techniques for complex VT cases.